Q14 of 22 Page 126

In the adjoining figure, if O is the centre of circle, the then the value of x is

∠QOR = 360 - 140 – 80


⇒ ∠QOR = 140°


By the theorem:-


The angle formed at the centre of a circle by an arc, is double of the angle formed by the same arc at any point on circle.


∠QOR = 2x


⇒ x = 70°

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